import Vue from 'vue'
import VueRouter from 'vue-router'
import Login from '../components/Login.vue'
import Home from '../components/Home.vue'


Vue.use(VueRouter)

const routes = [
    { path: '/', redirect: '/login' },
    { path: '/login', component: Login },
    { path: '/home', component: Home }
]



const router = new VueRouter({
    routes
})

//挂载路由导航守卫
router.beforeEach((to, from, next) => {
    // to将要访问的路径
    // from代表从哪个路径跳转而来
    // next 是一个函数， 表示放行
    //   next() 放行  next('/login') 强制跳转

    if (to.path === '/login') return next();
    //获取token
    const token = window.sessionStorage.getItem('token');
    if (!token) return next('/login');
    next();
})

export default router